Plug com line XLR into intercom in & loop through XLR to any other intercom stations. Then plug XLR audio out from interface into your board & use PFL/Solo to hear com.

With the Combo Interface you get both audio input & output, so you can plug a mic into the board and use an aux send to feed into the audio input to talk on the com line.

That would be fine except for the lack of a call light, which you'd need since you won't be on all the time. That's where the USB Intercom Call Alert comes into the picture. It powers any USB device (like the light shown) when the call button is pressed. A strip of red leds, dancing hula girl, whatever USB device suits your fancy.

Output Intercom interface & USB Call Alert together are $200, less than the cost of the beltpack alone. Plus not having to juggle headsets like this guy.